I was going to check the vavle adjustment today after work and got the lower left side crankcase cap off with no problem. The upper Crankcase cap to expose the T mark seemed to be a little rounded from the PO's attempt to put the old one back in instead of replacing it. Now I can't get the upper crankcase cap out and it is driving me crazy, the cap is pretty much rounded and won't break free. Does anyone know any tricks to get this out??